Integrating Woo Credits with Woo Subscriptions is very easy. To do so, follow these steps:

1) Create Credit Bundle as usual in Woo Credits Settings
2) Create Woo Product, specify it as “Simple Subscription” and set Subscription parameters (price, renewal schedule, etc)
3) VERY IMPORTANT!!! Click “Save as Draft” in order to make “Credit Plans” field appear
4) Specify which Credit Bundle you want to associate with the Subscription (see screenshot below).

After you’ve completed those steps, every time the Subscription renews, the amount of Credits specified in the bundle, will automatically be added to the customer’s Credit balance. Pretty straight forward process, but if you have any questions or trouble please post at Support tab or let us know on Twitter. Very excited to continue improving our plugin to make it a powerful and useful addon to Woo Commerce!